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# File lib/rexml/validation/relaxng.rb, line 378def next(event)# Make the choice if we haven'tif@events.size==0c=0;max=@choices.sizewhilec<maxif@choices[c][0].class ==Refexpand_ref_in(@choices[c],0)@choices+=@choices[c]@choices.delete(@choices[c])max-=1elsec+=1endend@events=@choices.find{|evt|evt[0].matches?event}# Remove the references# Find the eventsend#puts "In next with #{event.inspect}."#puts "events is #{@events.inspect}"unless@events@events=[]returnnilend#puts "current = #@current"superend